利用Apache POI操纵Excel

用python时找不到合适的模块来操作（读入，然后更新某些项目，然后保存）复杂的Excel（试过python-excel，读取时有警告，部分信息丢失），就转过来使用Java

import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;

import org.apache.poi.hssf.usermodel.HSSFCell;
import org.apache.poi.hssf.usermodel.HSSFDateUtil;
import org.apache.poi.hssf.usermodel.HSSFWorkbook;

public class PoiExcel {

	public static void main(String[] args) throws IOException {
		InputStream myxls = new FileInputStream("D:\\1.xls");
		HSSFWorkbook wb = new HSSFWorkbook(myxls);
		HSSFCell cell = wb.getSheet("Sheet1").getRow(16).getCell(2);

		if (cell.getCellType() == HSSFCell.CELL_TYPE_STRING) {
			System.out.println("单元格是字符串，值是： " + cell.getStringCellValue());
		} else if (cell.getCellType() == HSSFCell.CELL_TYPE_NUMERIC) {
			if (HSSFDateUtil.isCellDateFormatted(cell)) {
				System.out.println("单元格是日期，值是： " + cell.getDateCellValue());
			} else {
				System.out.println("单元格是数字，值是： " + cell.getNumericCellValue());
			}
		} else {
			System.out.println("单元格的值不是字符串或数值。");
		}
		cell.setCellValue(1);

		FileOutputStream fileOut = new FileOutputStream(
				"D:\\2.xls");
		wb.write(fileOut);
		fileOut.close();
	}
}

参考：POI读写Excel文件(转)，Apache POI